I still get support requests or requests for advice once in a while from people trying to use them, or thinking of hacking on them -- and these aren't even close to being popular projects.
I'm doing most of my open development on github these days, and this would mesh extremely well with the way that git hub, and more generally DVCS works.
Another possible nicety would be the ability to mark a repo as the "canonical" repo for a project. Right now that kinda happens with forks on github, but if a project is abandoned, and another person picks up maintenance on it, it would be nice to be able to say "this isn't the current repo anymore, look here instead" in a manner that isn't just putting a notice somewhere.